mark_gober
Petty Officer 3rd Class
- Joined
- Jan 12, 2009
- Messages
- 76
Hey everyone,
I've got a question regarding troubleshooting my ignition system on my 85 XD18 motor. It's been running rough lately and I rebuilt the carb....still runs rough. I grabbed some high voltage gloves and pulled the lower spark plug wire off and no change in symptoms. Pulled top plug wire off and motor won't run. That tells me that I only have the top cylinder firing. I have a copy of some troubleshooting procedures that Laddies posted in this post...
http://forums.iboats.com/showthread.php?t=303997
My question is this...in the procedure, it lists the DVA output and I'm not sure that I know what this is? At first, I thought it was perhaps a throwback term for a voltmeter. (I've seen references in older manuals for VOM as another word for voltmeter) Now I'm not sure. I used my Fluke multimeter to go to the + terminal of the coil and the black lead to engine ground and I got nothing. The firing cylinder is working because I accidently got across both of the coil terminals with my meter lead and I got a nice spark. (So why do I not read anything on those terminals?)
Laddies makes reference to a direct volt meter in his post. I've been an electronics technician for 13 years and I've never heard that term before. Perhaps someone can make heads/tails out of the procedure for me. I'm mechanically minded and I'm very familiar with internal combustion engines. Laddies also makes reference to high speed windings as well as low speed windings. I'm not sure I know what he means to that also. This is a 2 cylinder engine with two coils and one switchbox. I look forward to hearing everyones thoughts on how to proceed.
Mark
I've got a question regarding troubleshooting my ignition system on my 85 XD18 motor. It's been running rough lately and I rebuilt the carb....still runs rough. I grabbed some high voltage gloves and pulled the lower spark plug wire off and no change in symptoms. Pulled top plug wire off and motor won't run. That tells me that I only have the top cylinder firing. I have a copy of some troubleshooting procedures that Laddies posted in this post...
http://forums.iboats.com/showthread.php?t=303997
My question is this...in the procedure, it lists the DVA output and I'm not sure that I know what this is? At first, I thought it was perhaps a throwback term for a voltmeter. (I've seen references in older manuals for VOM as another word for voltmeter) Now I'm not sure. I used my Fluke multimeter to go to the + terminal of the coil and the black lead to engine ground and I got nothing. The firing cylinder is working because I accidently got across both of the coil terminals with my meter lead and I got a nice spark. (So why do I not read anything on those terminals?)
Laddies makes reference to a direct volt meter in his post. I've been an electronics technician for 13 years and I've never heard that term before. Perhaps someone can make heads/tails out of the procedure for me. I'm mechanically minded and I'm very familiar with internal combustion engines. Laddies also makes reference to high speed windings as well as low speed windings. I'm not sure I know what he means to that also. This is a 2 cylinder engine with two coils and one switchbox. I look forward to hearing everyones thoughts on how to proceed.
Mark